1 files changed, 65 insertions, 0 deletions
diff --git a/reverse-engineering/dosbox_snif/rsp_lemm.c b/reverse-engineering/dosbox_snif/rsp_lemm.c
new file mode 100644
index 0000000..e39ef30
--- /dev/null
+++ b/reverse-engineering/dosbox_snif/rsp_lemm.c
@@ -0,0 +1,65 @@
+#include "rsp_lemm.h"
+#include "utils.h"
+
+#include <string.h> /* memset(), strncmp() */
+#include <stdio.h> /* printf() */
+
+int rsp_lemm_init(struct rsp_state *rsp, char *ds_si) {
+	int rv;
+	int sockfd;
+
+	memset(ds_si,'X',10);
+	ds_si[9]='\0';
+
+	rv = tcp_client_init(HOST, PORT, &sockfd);
+	if ( rv != 0 ) return rv;
+
+	rsp_init(sockfd, MAXDATASIZE-1, rsp);
+
+/*
+	rsp_query(rsp, "qRcmd,666c61745f6569702c30"); //flat_eip,0
+	if ( rsp_check_and_clear(rsp, "OK") != 0 ) printf("Bug\n");
+*/
+	rsp_query(rsp, "?");
+	if  ( rsp_check_and_clear(rsp, "S05") != 0 ) {
+		// The program is not stopped
+		rsp_send_break(rsp); // Request to freeze the program
+		if ( rsp->replied != 1 ) return 10;
+	}
+
+	rsp_query(rsp, "Z0,38C4,1"); // Set execution breakpoint at 0208:1844 (0x38C4)
+	if ( rsp_check_and_clear(rsp, "OK") != 0 ) return 11;
+
+	do {
+		rsp_query(rsp, "c"); // Continue
+		if ( rsp->replied != 1 ) continue; //return 12;
+		rsp_recv_full(rsp);
+		if ( rsp_check_and_clear(rsp, "S05") != 0 ) continue; //return 13;
+//		(void) rsp_check_and_clear(rsp, "S05");
+
+		rsp_query(rsp, "p8"); // Read $eip (/!\ byte order. ex : $e4b0* !#76 )
+//		if ( rsp_check_and_clear(rsp, "c4380000") != 0 ) return 14;
+	} while ( rsp_check_and_clear(rsp, "c4380000") != 0 );
+
+	rsp_query(rsp, "pc"); // Read $ds
+	if ( rsp_decode(rsp) <8 ) return 15;
+	ds_si[0]=rsp->decoded[2];
+	ds_si[1]=rsp->decoded[3];
+	ds_si[2]=rsp->decoded[0];
+	ds_si[3]=rsp->decoded[1];
+	ds_si[4]=':';
+
+	rsp_query(rsp, "p6"); // Read $si
+	if ( rsp_decode(rsp) <8 ) return 16;
+	ds_si[5]=rsp->decoded[2];
+	ds_si[6]=rsp->decoded[3];
+	ds_si[7]=rsp->decoded[0];
+	ds_si[8]=rsp->decoded[1];
+
+	printf("ds:si == %s\n", ds_si);
+	flatten(ds_si);
+	printf("$ds_si == %s\n", ds_si);
+
+	return 0;
+}
+